The graph below compares the total amounts of greenhouse gas emissions expected for future mid-size cars, including emissions that occur when moving fuels from their original source to fueling stations where people can buy the fuels for their cars. Amounts are shown in grams of CO₂ (or equivalent greenhouse gas) per mile driven by the mid-size car. Which vehicles are the best choices for environmentally friendly cars?
A. fuel cell electric and battery electric
B. hybrid electric and plug-in hybrid electric
C. conventional internal combustion and hybrid electric
D. conventional internal combustion and battery electric

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

you need to have a picture of the atom that way we can answer it